Just depends on the shop really. A good number certainly have gone under just like we’ve seen in all aspects of retail, others are doing fine. We almost certainly will see more go out of business as time goes on, but the internet doesn’t mean they all will of that it’s impossible for them to do well.
There are far shadier people selling coins on E-Bay. I wonder how many people crack out detail coins and price them on E-Bay as a problem free coin? Without even a peep from the seller the coin has a problem. At least, the listing in the OP is so overt most folks, if not all folks, will avoid it. I also agree with the coin could be a fave of the seller's. We all have those coins. It is a nice coin.
Trust and education are two of the value added attributes that are the most important to mu business. And yes. Mom and pop coin store are suffering just as other stores in retail.
.......and it could be that the seller knows that the coin is seriously undergraded. We know now that Gods make mistakes......
I have some proof shield nickels consigned with me, but over the past 3 years the market for them has fallen by 30-40%. The consignee doesn't want to lose money, however, so they'll sit there until either the market rises again or someone is willing to pay up for them. Many sellers consign these days as a way to make 5-10% commission without having to sink money into buying the coins themselves.
I think the ones with a good reputation will be around, so long as the children want to keep up the business if the owner passes. However, with the internet, I am finding more and more vendors at shows only do shows. Why have a shop? You can sell out of your home online. With good digital, high-def photos and decent return policies, brick and mortar stores aren't needed nor are they worth the expenses to turn the key every day. Pretty sure like everything else, people like the convenience of online shopping.
There certainly are places and some stores that can and will survive even smaller mom and pop ones. A lot of the ones with a store front especially the smaller ones do more than just coins and very often have jewelry as well as one example and/or have embraced the internet to some extent as well. You are right though there are more that have and are moved to the online only model or internet and shows. I think we will be seeing more of this fromtge coin only sellers since it’s so much cheaper for them to operate that way. There are two areas where a shop does have an added benefit. The major one is for buying, obviously people can’t come in trying to sell coins to an online shop. The other would be super high end coins but that’s an obstacle that can easily be over come without a shop anyway.
Many coin business that I have bought from take the "both and" approach to business: Both brick-and-mortar, and online presence (...and an eBay store to boot!).